Flash point testing machine



Dec. 26, 1933. MlZUTA ET AL 1,941,182

FLASH POINT TESTING MACHINE Filed Dec. 18, 1930 finai 2 l EZQMW Patented Dec. 26, 1933 PATENT OFF-ICE.

FLASH POINTTESTING-MACHINE Masakichi .Mizuta, Marunouchi, Kojimachi-Ku, Tokyo, and Teiji Yoshi'mura, kubo, 'Kashiwazaki Machi, Kariha Gun, Niigata Ken, H Japan, ,assignors'toNihon Sekiyu Kabushiki i" Kai'sha, Tokyo, "Japan,"a corporation of Japan Application-December 18,1930, Serial No. 503,332, a and in Japan December 30, 1929 2 Claims.

This invention relates to improvements in Pensky Martens flash point testing machine, which comprises a double-walled oil-cup, and a conical inner casing for test 011 put close to a i 1 5 flash nozzle, the space between the walls opposite the said casing being slightly enlarged to regulate the transmission of heat. The object thereof is to make it possible to find a flash point accurately and rapidly with a small quantity of test sample by diminishing the surface exposed to strong heat and thus preventing the decomposition of the test sample due to partial overheating.

Referring to the accompanying drawing,- Figure 1 is a sectional elevation of the machine according to this invention;

Figure 2, a vertical section through the oil p;

Figure 3, a plan of the same and Figure 4, a back view of the base of the inner casing. a

In order to measure the ignition point of oil it isusual to use Pensky Martens testing machine. However, with such a machine some flash nozzle. The space between the walls on the opposite side is enlarged. Thus, by making the inner casing in a conical form, the surfaceto be exposed to strong heat is considerably diminished sition of oildue to partial over-heating is prevented and thus the flash point can be found rap-v idly and accurately by using only about 16 millilitres of sample for one test. Also, by putting the inner casing close to the flash nozzle the hot air current outside the inner casing dueto heating is stopped on the side of the flash nozzle and the test flame is prevented from fluttering. Furthermore, the oil vapor is not'affected by the temperature of the heating gas so that the examination can be made accurately. I

The following is the explanation of this invention with reference to the accompanying drawing:

'55 An oil cup to beinserted in the frame 1 such 73-44 milli-litres of test sample is neede'd for,

to receive heat uniformly, whereby the decompo as of Pen'sky Martens test machine consists of an outer casing 2 having shoulder 10, and a conical inner casing 3 which has its base pierced with perforations 2, the, said inner casing having on its inner wall a shoulder 4 to indicate the fixed amount of test sample (10 milli-litres at ordinary temperature) and put close to the flash nozzle 8, while the space 5 between the walls on the opposite side is slightly enlarged. In the said inner casing there is provided a singlebladed stirrer 6 and a thermometer 7.

The following is themanner of using this invention:-

Insert the inner casing into the outer casing as shown in Figure 1 as is the case with a common ignition point testing machine and make the upper edge ofthe inclining side of the inner casing contact closely with the upper edge of the outer casing on the side of the flash nozzle. Provide the lid and thermometer and then ascertain whether the stirring, the facing downward of test flame, etc. can be performed satisfac torily or not. After this, light the test flame, the length of which is nearly 5 millimeters. Next, about 10 milli-litres of test oil is poured into the inner casing at'room temperature by using a pipette (at atmospheric temperature) up to the shoulder on the inner wall and the oil is heated after putting the lid on the said casing. As to the speed of heating, the temperature is raised at 6-10 C. per minute up to about 20 C. below the expected flash point for test oil of flash point over 100 C.; and then at ,45 C. per minute over it. The stirring is performed when .the tempera ture of the oil has reached over 100 C. and thus when it approaches the expected flash point, turn down the test flame and test the ignition.

In the preliminary test the facing-down of the test flame is performed at every 5 degrees from about 30 C. below the expected flash point and at every 2 degrees from 10 C. below the flash point. From the second time it is done at every 2 degrees from 15 C. below .the ignition point obtained in the preliminary test and at every 1 following is the comparison of this invention with comprising a cylindrical outer casing; an invert- Pensky Martens machine:-- ed conical inner casing, for receiving the oil to be tested, eccentrically disposed within the walls g of the outer casing and having its periphery substantially tangent thereof and a flash nozzle disposed adjacent the point of tangency of the casings.

33cm 39E: 33 B 3 525g ovnEw and outer casings at the point of tangency, and 3 a flash nozzle disposed adjacent the point of tangency of the casings.

Flash point when the machine according Pensky Martens testin 5 to this invention is used.

n 0 u 00 m 5;; Mam l 2 111 m 0 h 00 m n? M uwwnw 2 111 00 0rd 222 ww mx 22111 350m @252 5 0 0 5 O 00 E H m Test sample oil Cylinder Oil No. 2

Machine oil Transformer oil 137.

MASAKICHI MIZUTA. TEIJI YOSHIMURA.

We claim:

- 1. Apparatus for testing the flash point of oil, 

